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Nitrogen removal from landfill leachate via the nitrite route
| Content Provider | Scilit |
|---|---|
| Author | Kulikowska, D. |
| Copyright Year | 2012 |
| Description | The feasibility of removing nitrogen from mature landfill leachate using the nitrite route was investigated in a two-stage SBR system - (1º first stage, short-cut nitrification; second stage, denitrification via nitrite. With a volumetric exchange rate (n) of 0.3 d-1 and an oxygen concentration of between 1.2 and 1.3 mg/L, the nitrite accumulation ratio - (NO2-N)×100/(NOx-N)% - was between 32% and 37%. For the same hydraulic retention time, but lower oxygen concentration - between 0.8 and 0.9 mg/L - nitrite accumulation averaged 96%, indicating that ammonia was removed completely via the nitrite pathway. In the second step, an external carbon source was added to promote denitrification. Complete removal of nitrite was obtained for a carbon dose of 2.4 mg COD/mg NO2-N using acetic acid and 3.8 mg COD/mg NO2-N for butyric acid. Also, a higher denitrification rate - 14.6 mg NO2-N/g VSS∙h - was observed with butyric acid as compared with acetic acid - 9.12 mg NO2-N/g VSS∙h. |
| Related Links | http://www.scielo.br/pdf/bjce/v29n2/a02v29n2.pdf |
| Ending Page | 219 |
| Page Count | 9 |
| Starting Page | 211 |
| ISSN | 01046632 |
| e-ISSN | 16784383 |
| DOI | 10.1590/s0104-66322012000200002 |
| Journal | Brazilian Journal of Chemical Engineering |
| Issue Number | 2 |
| Volume Number | 29 |
| Language | English |
| Publisher | FapUNIFESP (SciELO) |
| Publisher Date | 2012-06-01 |
| Access Restriction | Open |
| Subject Keyword | Brazilian Journal of Chemical Engineering Biotechnology and Microbiology Landfill Leachate cut Nitrification Denitrification Via Nitrite |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemical Engineering |
